Ring of Phantasms from the Deep

This elaborate ring appears to be crafted from leather, clinging to the ring finger on its own accord. While attuned to this ring you can speak Deep Speech and have advantage on Charisma (Persuasion) checks involving aberrations. In addition, you can use the ring to cast mirror image as an action. Once the spell has been cast using the ring, that spell can’t be cast from the ring again until the next dawn.